Hall helps Ohm: some corrections to negative-U centers approach to transport properties of YBa${}_2$Cu${}_3$O${}_x$ and La${}_{2-x}$Sr${}_x$CuO${}_4$

Abstract

For broad oxygen and strontium doping ranges, temperature dependences (T-dependences) of the normal state resistivity ρ(T) of YBa_2Cu_3O_x (YBCO) and La_(2-x)Sr_xCuO_4 (LSCO) are calculated and compared to experiments. Holes transport was taken in the τ-approximation, where τ(T,ε) is due to acoustic phonons. Besides, T-dependence of the chemical potential μ(T) and effective carrier mass m* ~10-100 free electron masses, obtained by negative-U centers modelling the T-dependence of the Hall coefficient, were used to calculate ρ(T). In addition, it is demonstrated that anisotropy of the cuprates does not affect the calculated T-variation of neither Hall coefficient nor ρ, but only rescale their magnitudes by factors depending on combinations of m_ab and m_c.

4th International Conference Fundamental Problems of High-Temperature Superconductivity, Moscow-Zvenigorod (October 3-7, 2011) Submitted to J. Supercond. Nov. Magn.: after revision. Extension for Supercond. Sci. Technol. 24 075026 (2011), DOI: 10.1088/0953-2048/24/7/075026 Contains: 2 pages, 3 figures

References in corpus (3)

• The pseudogap in high-temperature superconductors: an experimental survey
• Hall effect in the marginal Fermi liquid regime of high-Tc superconductors
• Anisotropic renormalized fluctuations in the microwave resistivity in YBCO